JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 20
·17688-17702
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IF 2.22
Liu Jun,Hui Qian,Chang Meng-Jie,Cui Wen-Na,Xi Tong,Wang Lin-Da,Sun Meng,Yuan Bin,Ni Fu-Rong
Herein, novel fibrous Bi 4 Ti 3 O 12 /Bi 2 S 3 /MoS 2 is constructed by a simple one-step methodology for photocatalytic degradation of RhB dyes. Bi 4 Ti 3 O 12 /Bi 2 S 3 /MoS 2 hybrid fibers were facilely prepared by direct hydrothermal growth of MoS 2 nanosheets on electrospun Bi 4 Ti 3 O 12 nanofiber surface, during which rod-like Bi 2 S 3 was formed by in-situ ion exchange reaction between BTO and S source. The MoS 2 nanosheets with several-layer thickness uniformly are coated both on the BTO and Bi 2 S 3 surface. Remarkable enhancement of visible light absorption and photo-generated charge separation in Bi 4 Ti 3 O 12 /Bi 2 S 3 /MoS 2 are achieved compared with the bare BTO nanofibers. By changing the weight ratio of Mo/S and the precursor dosage of MoS 2 , the optimized BM-150/250 sample presents 2.3 and 4.1 times higher of the photodegradation efficiency and apparent reaction rate constant, respectively, than that of pure BTO fibers after 120-min irradiation under visible light. The system pays an efficient pathway to establish ternary composite fibers providing high photocatalytic activity for other electrospun Bi-contained nanofibers.
研究领域:
材料科学
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环境科学
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纳米技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2017
·
IF 3.133
Xue Yu,Peiwen Wu,Caixia Qi,Junjie Shi,Lijuan Feng,Chunhu Li,Liang Wang
Tremendous demands for photocatalysts with high chemical activity and stability, low cost and capability of response to visible-light have stimulated intensive research on developing versatile materials with special photocatalytic applications. Here we report a novel g-C 3 N 4 /BiOBr-RGO aerogel ternary-component heterojunction photocatalyst for degradation of RhB under visible light irradiation. As a result of synergistic effect of the g-C 3 N 4 , BiOBr and RGO, the hybrid photocatalysts exhibit better activity than the single component catalysts (pure g-C 3 N 4 , BiOBr) and bi-component catalysts (g-C 3 N 4 /BiOBr) in the same time period (60 min). The enhanced photocatalytic performance originates from a novel nanoarchitecture in which BiOBr exposed more active plane and RGO worked as a conductive support further improved the photogenerated charge separation. Moreover, due to the 3D structure of RGO after reaction the photocatalysts can be easily removed from the treated solution and reused, which opens up a way for the recycling applications of catalysts in aqueous reaction systems.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Xiaohan Zhou,Bo Li,Yujia Liu,Yuyu Zhang,Lishuai Song,Nan Liu,Zequan Li
Using melamine-cyanuric acid (MCA) supramolecular polymer as a precursor, a method was employed to synthesize graphitic carbon nitride with a large specific surface area and controllable band structure . The band structure and morphology of graphitic carbon nitride (g-C 3 N 4 ) are closely related to the type of solvent used. By treating it with hypophosphorous acid and subsequent high-temperature treatment for 10 h , the precursor material was calcined to produce graphitic carbon nitride with a hollow tubular morphology. Experimental results demonstrate that this material exhibits outstanding performance in photocatalytic degradation of Rhodamine B and Bisphenol A. This work provides a new and effective strategy for achieving visible-light photocatalytic degradation of organic compounds.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
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2023
·Vol. 12
·期 7
·076009
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IF 2.2
Chengsha Huang,Jin Li
The low-temperature hydrothermal and water bath methods are used to manufacture CuS@ZnO/CdS catalyst. The Rhodamine B degradation rate constant of CuS@ZnO/CdS is around 1.53 × 10−2 min−1, which is 3.9 times greater than that of ZnO. The coupling of CdS and loading of CuS onto ZnO surfaces were evaluated using XRD, SEM, TEM, and XPS. SEM demonstrated that 5 mg of CdS was the most effective in controlling the shape of ZnO nanoflakes. Ultraviolet-visible absorption (UV–vis) and Photoluminescence (PL) spectra reveal that CdS and CuS decreased the bandgap of ZnO and boosted its ability to absorb visible light. Transient photocurrent response (TPR) and electrochemical impedance spectra (EIS) display that CdS and CuS facilitate the quick separation of photoexcited carriers in ZnO. Notably, the optimal weight ratio of CuS was determined to be 15%, since excessive amounts of CuS would operate as recombination centers and cover active sites. Additionally, the dual Z-scheme carriers movement mechanism was proposed using sacrificed agent experiments, and TOC analyzed the mineralization rate of RhB after degradation. In this study, CuS@ZnO/CdS photocatalyst degraded RhB nearly 99% in 80 min, which is superior to the earlier photocatalysts. Therefore, this article holds great significance in the practical application of metal chalcogenide-modified ZnO-based photocatalysts with superior visible light-induced degradation performance in environmental purification.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
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IF 4.439
Juan Wang,Guohong Wang,Xianhong Wei,Guo Liu,Jun Li
A ZnO/TiO 2 heterojunction photocatalyst based on ZnO nanoparticles embedded in the hierarchically structured TiO 2 framework containing parallel macroporous channels and thin mesoporous walls has been synthesized by a common calcination treatment using zinc chloride and tetrabutyl titanate as the raw materials. The materials properties of the ZnO/TiO 2 heterojunction photocatalysts have been carefully characterized with SEM/TEM, XRD, FTIR, XPS, BET analyses, UV–Vis absorption and photoluminescence spectroscopy. The photocatalytic performance for decomposition of Rhodamine B (RhB) under UV light irradiation has been systematically investigated in correlation with the materials structures. The apparent RhB degradation rate constant ( k ) has been determined to be 20.7 × 10 −3 min −1 for the optimal hybrid photocatalyst with 5 wt% of ZnO loading, significantly higher that of pure TiO 2 (12.2 × 10 −3 min −1 ) and pure ZnO nanoparticles (5.7 × 10 −3 min −1 ), respectively. Active species trapping experiments reveal that •OH and •O 2 − play the major roles in the photocatalytic reactions. The enhanced performance can be ascribed to the formation of a direct Z-scheme heterojunction structure between ZnO and TiO 2 in contrast to the usual type-II heterojunction.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
LANGMUIR
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2025
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IF 3.9
Heng Li,Chengzhong Zhang,Yuhang Jiang,Wenwu Ni,Mingshuo Li,Jing Wang
Widespread dye contamination poses a serious threat to humans and aquatic environments. Metal–organic frameworks (MOFs) with abundant reactive groups and high specific surfaces are candidates for the adsorption of dyes. In this study, good growth of UiO-66-SO3H crystals on the surface of nylon-6 fibers was achieved based on the idea of in situ growth. UiO-66-SO3H with a sulfonic acid group was successfully introduced into nylon-6 electrostatic spinning fiber, and the UiO-66-SO3H@nylon-6 membrane with high specific surface area and a three-dimensional mesh structure was obtained, which effectively solved the problems of clogging of the equipment, difficulty in being separated and recovered from the water, the possible secondary pollution of the water environment caused by the powder form of the MOF material, etc. The UiO-66-SO3H@nylon-6 membrane has a good adsorption capacity for rhodamine B (RhB), and the experimental data are consistent with the pseudo-second-order kinetic model and Langmuir model, which shows that the adsorption is a spontaneous heat absorption process. Pore-filling, hydrogen bonding, π–π interactions, and electrostatic attraction induced by –SO3H are the adsorption mechanisms of RhB on this adsorbent. In conclusion, the UiO-66-SO3H@nylon-6 membrane is an adsorbent capable of rapid adsorption of RhB and can be easily separated from water for recovery, regeneration, and utilization. This study may provide ideas for the application of MOFs in the field of pollutant removal.
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS RESEARCH
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2017
·Vol. 32
·期 18
·3605-3615
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IF 1.673
Yongkun Liu,Qin Huang,Guohua Jiang,Depeng Liu,Weijiang Yu
In this work, the hybrid carbon nanofibers (Cu2O/CNFs) containing cuprous oxide (Cu2O) nanoparticles were prepared by a convenient electrospinning method and following a carbonization treatment. The morphology, composition, and microstructure of the Cu2O/CNFs were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffractometer. The as-prepared Cu2O/CNFs exhibited a stronger absorption in the range of 250–700 nm. The band gap energy of the Cu2O/CNFs was estimated to be 2.0 eV. Due to the synergistic effect between photocatalytic activity of Cu2O and excellent adsorption capacity of CNFs, the obtained Cu2O/CNFs exhibited excellent photocatalytic activity for degradation of rhodamine B (RhB) and phenol. The possible mechanism for degradation of RhB and phenol degradation were also discussed. The resultant hybrid carbon composites offer the significant advantages, such as low dosage, high catalytic activity, easy recycling, and excellent stability. We hope that the resultant hybrid composite Cu2O/CNFs could be applied as catalytic materials for further application in the future.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2019
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IF 5.589
Shuang Liang,Yueyue Chen,Shiming Zhang,Yuanyuan Cao,Junchao Duan,Yapei Wang,Zhiwei Sun
Silica nanoparticles (SiNPs) have been widely used in human health related products, such as food additives, cosmetics and even drug delivery, gene therapy or bioimaging. Recently, a first-in-human clinical trial based on polyethylene glycol (PEG)-modified SiNPs had been approved by US FDA to trace melanoma. However, as a nano-based drug delivery system, its biocompatibility and vascular toxicity are still largely unknown. Thus, we synthesized the fluorescent SiNPs to explore the biocompatibility and vascular endothelial function, and compare different biological effects caused by PEG-modified and unmodified SiNPs in cells and zebrafish model. The characterizations of SiNPs and PEG-modified SiNPs were analyzed by TEM, SEM, AFM and DLS, which exhibited relatively good stable and dispersive. Compared with SiNPs, PEG-modified SiNPs had markedly reduced the inflammatory response and vascular damage in Tg (fli-1: EGFP) and Tg (mpo: GFP) transgenic zebrafish lines, respectively. Consistent with the in vivo results, the PEG-modified SiNPs had been found to significantly decline the levels of ROS, inflammatory cytokines and mitochondrial-mediated apoptosis in vascular endothelial cells compared to SiNPs, and the ROS scavenger NAC could effectively alleviate the above adverse effects induced by nanoparticles. Our results suggested that the PEG-modified SiNPs could become more safety via increasing the biocompatibility and decreasing cellular toxicities in living organisms.
研究领域:
纳米技术
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生物医学工程
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药理学
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毒理学
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产品关联
DOI
PubMed
高影响因子
CURRENT APPLIED PHYSICS
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2022
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IF 2.856
Xiaoxue Lian,Yan Li,Yunling Zou,Dongmin An,Qiong Wang,Qingjun Zhou,Xueqi Li
The g-C 3 N 4 nanosheets were synthesized by a multistage program calcination with different heating rate, which was an easy, low-cost, and quick method. The morphology and structure of samples were characterized by various techniques. The performance evaluation of the samples was tested by degrading Rhodamine B, Methylene Blue, Tetracycline Hydrochloride and P-Nitrophenol in visible light . The results show that the photodegradation properties of TP-g-C 3 N 4 prepared by multistage program calcination are the best than others. In particular, the degradation rate of TP-g-C 3 N 4 to Rhodamine B reached 99.6% in just 4 min. TP-g-C 3 N 4 catalyst has excellent stability and recycling performance. According to free radical capture experiments, •O 2 − may be the main active species for pollutant degradation. The possible photocatalytic degradation mechanism was also discussed. Due to the high specific surface area and a narrow band gap, the TP-g-C 3 N 4 becomes a promising photocatalyst.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2023
·
IF 3.8
Hadeel A. Khayoon,Mohammed Ismael,Abbas Al-nayili,Hassan A. Alshamsi
LaFeO 3 -nitrogen deficient g-C 3 N 4 (LaFeO 3 -g-C 3 N 4 -H) heterostructure has been fabricated obtaining thermal polymerization of acetic acid-treated melamine followed by incorporation of perovskite-type LaFeO 3 onto the graphitic carbon nitride nanosheets (g-C 3 N 4 ) using La(NO 3 ) 3 ·6H 2 O and Fe(NO 3 ) 3 ·9H 2 O as precursors. The as-synthesized nanocomposite was investigated using Fourier Transform Infrared Spectroscopy (FT-IR), powder X-ray diffraction (XRD), UV–Vis Diffuse Reflection Spectroscopy (UV–Vis DRS), Scanning Electron microscope (SEM), and Transmission Electron microscope (TEM). The findings of the characterization study revealed the successful incorporation of LaFeO 3 on g-C 3 N 4 -H nanosheets. The band gap energy of LaFeO 3 -g-C 3 N 4 -H heterojunctions was found to be active in the visible light region. The LaFeO 3 -g-C 3 N 4 -H ability to degrade Rhodamine B (RhB) dye in an aqueous solution was investigated under sunlight illumination. The results of photocatalytic degradation activity showed that LaFeO 3 -g-C 3 N 4 -H photocatalyst has presented the highest photocatalytic efficiency of 99.5% after 60 min under sunlight irradiation. The remarkable photocatalytic activity can be attributed to the defect structure of g-C 3 N 4 and the construction of heterojunction. In addition, LaFeO 3 -g-C 3 N 4 -H showed promise recyclability after 5 cycles with slight activity reduction.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Yabin Zhang,Chan Xu,Fangcheng Wan,Di Zhou,Liu Yang,Haoshuang Gu,Juan Xiong
Flower-like Bi 2 Sn 2 O 7 /Bi 2 WO 6 hierarchical composites with Bi 2 Sn 2 O 7 nanoparticles on Bi 2 WO 6 nanosheet by different Bi 2 Sn 2 O 7 contents were synthesized via a facile two-step hydrothermal method . The composite of Bi 2 Sn 2 O 7 /Bi 2 WO 6 exhibits higher photocatalytic activity toward Rhodamine B (RhB) under visible light than pristine Bi 2 WO 6 and Bi 2 Sn 2 O 7 . Comparatively, 7% Bi 2 Sn 2 O 7 /Bi 2 WO 6 showed the highest photocatalytic activity owing to the best separation efficiency of photogenerated charges. The role of the active species in the process of the degradation is evaluated by using different types of active species scavengers which revealed that the holes ( h + ) and hydroxyl radicals ( OH) were the main active species responsible for the photodegradation of RhB. The photocatalytic mechanism is further proposed based on impedance spectroscopy (EIS) and the calculated energy bands by Mott-Schottky plot, which unfolds the charge transfer and the active species formed in the photocatalytic process. Furthermore, the as-obtained photocatalysts showed good photocatalytic activity after three recycles.
研究领域:
材料化学
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光催化
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纳米材料
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环境功能材料
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能源与催化
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2015
·Vol. 17
·期 43
·29354-29362
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IF 4.493
Xia Cui,Yi Fan Zheng,Hao Yong Yin,Xu Chun Song
In this study, C3N4/Zn1−xCdxS (0 ≤ x ≤ 1) heterostructures with adjustment of the band gap were successfully prepared by calcination and a hydrothermal synthesis method. The photocatalytic properties of C3N4/Zn1−xCdxS composite photocatalysts were evaluated by the photocatalytic degradation of RhB under visible light irradiation. The results showed that the combination of the two semiconductor photocatalysts (C3N4 and Zn1−xCdxS) greatly enhanced the photocatalytic degradation efficiency of RhB compared to the pure C3N4 and Zn1−xCdxS under visible light irradiation. Among them, the 0.1C3N4/Zn0.8Cd0.2S composite photocatalyst exhibited the highest photocatalytic activities with the degradation efficiency of RhB arriving to 97.9% within 90 min. The remarkable photocatalytic activity of the 0.1C3N4/Zn0.8Cd0.2S composite photocatalyst was mainly attributed to the appropriate band structure and the effective separation of photogenerated electron–hole pairs. Additionally, a possible basic mechanism of the composite semiconductor photocatalytic process was also discussed. Moreover, it was also investigated that O2˙− and h+ were the main reactive oxidative species in this photocatalytic process of the degradation of RhB on the 0.1C3N4/Zn0.8Cd0.2S heterostructure photocatalyst.
研究领域:
材料科学
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环境科学
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光催化
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）